History has seen goverments from all over the world spend trillions and trillions of dollars on ways to kill or maim human beings. With such bloated spending in the pursuit of defense, there's bound to be waste.

Still, if there's one positive thing that can be said for warfare, it's that it constantly demands innovation. You can thank military spending for GPS, microwaves, computers, and, most importantly, duct tape. But not all military inventions work out. Some of them are poorly managed, others are ill-conceived, and a few are just downright ridiculous.